Precor 447 Precision Series Elliptical Cross Trainerbr Click below to buy on Amazon: br Precor Cross Ramp technology adjusts the shape of the elliptical path your feet travel so you can target specific muscles br Patented elliptical path perfectly mimics a natural running stride allowing exercisers to keep their heels down and maintain proper biometrics br 25 preset workouts help you stay challenged built-in Work Out Accelerators suggest ways to get more out of your workout br Workout data can be automatically uploaded to the Preva mobile app to track your goals and achievements br Touch sensor and wireless heart rate monitoring works with any Polar-compatible wireless heart rate transmitter sold separately